Bark-removing machine.



.0. BAcHE-Wim BARK REMOVING MACHINE.

APPLICATION FILED FEB. 23, 1907.

llllIlllIIIIIIIIllllllllfllHllHllIIIIIIHHIHIIIIIIIIIIIIIHII PATENTED JUNE 2, 190B.

2 SHEETS-SHEET 1.

llllll" M'Zrzesses;

0. BAGHB-WU h BARK REM fi-VING MACHINE.

APPLICATION FILED PEB.28, 1907.

2 SHEETS-SHEET 2;

PATENTED JUNE 2, 19 08..

accompanying drawings,

UNITED STATES PATENT onnrcn.

CARL BAoHE-wuo, or GLENS FALLS, NEW YORK.

BARK-REMOVING uaomnn.

No.sse,2e2.

Specification of Letters Patent.

Patented June 2, 1908.

Application filed February 28, 1907. Eerie: No. 359,7G'i'.

To all whom it may concern:

Be it known that I, CAR BAonE-Wim, of GlensFalls, county of Warren, State of New York, have invented an Improvement in Bark-Removing Machines, of which the following description, in connection with the like characters on like parts.

This invention relates to bark removing the drawings representing machines adapted to remove the bark from blocks of wood preparatory to grinding the blocks for the production of wood pulp, or to otherwise treating them.

At the present time the machine commonly used for this purpose has knives which operate to chip off the bark, and in operation small pieces of Wood are also chipped off,

' which resultsin a substantial loss of wood.

- short Furthermore, machines of this kind do not operate well upon irregularly shaped blocks and blocks of small diameter.

This invention'has for its object to construct a machine adapted to remove the bark from irregularlyas well as regularly shaped blocks of wood, and from blocks of wood of small aswell as of large diameter,

" and withoutloss of wood.

The' invention consists essentiall in a revolving drum, of cylindrical or ot er for/m; ada ted to receive the blocks of Wood and to turn lo the same as the drum revolves, said drum having upon' its interior block-engag ing bark-removing means by which the blocks contiguous the side wall and end walls of the drum, or someof them, are engaged and the bark is scraped off; and by which said blocks,- or some of them, are also moved relatively to their neighbors and by rubbing against them the bark of both the blocks so moved and of their neighbors will be scraped oii. By the employment of such mea in addition to the tumbling action due the drum revolving,. the bark is en,- tinely removed withoutloss of wood and in a eriod of time.

My invention also has for its object to provide means for softening the bark and the the blocks are submerged, or steam or other 1 vapor or gas may be employed in lieu there- .of to serve as a softening agent.

My invention also has for its object'to prois a specification,

other form.

vide means for removing the ieces of bark as they are detached from the locks,.and to this end my inwnticn consists in adapting the revolving water or other liquorand to provide an 0 ening for the escape of the'hquor at a evel whereby the floating pieces of bark will he carried away with or by the liquor.

Figure I shows in removing machine embodying my invention. Fig. 2 is an end view of the machine shown in Fig. 1. section of the machine shown in Fig. 2, taken on the dotted line 33. Fig. 4 is a transverse section of the revolving drum. Fig. 5 is an enlarged sectional detail of aportion of the drurnand its cover. showing a. ortion of the c lindrical wall ofthe drum aid out flat. F showing a modified form of drum to be referred to. Fig. 8 is a sectional. detail of one of the blocken aging ribs.

Referring to *igs. l to 6, which show the preferred" form of apparatus and manner of carrying out my invention; a and I) represent two circular or other shaped heads or plates, of the same dimensions or thereabouts, which are adapted to serve as and constitute the heads or ends of a drum, of cylindrical or The head a is secured to a hollow journal or shaft or, which is so ported bysuitable bearings, and the head is secured to a hollow journal or shaft 1), likewise sup orted by suitable bearings. A large toot ed gear 0 is secured to one of said journals, it being herein shown as securedto the journal b, and said gear is engaged b'ya I drum toreceivea volume of ig.- 7 a view. '1'

front elevation a barkc Fig. 6 is a detail inion c, secured to a shaft bearing fast and oose driving pulleys c By means of said drivingrmechanism the drum is revolved. A- sheet of met'ald or other material, in the form of a cylinder or other form, corresponding to the shape of'the heads a'andb, is Se cured at itsedges to said heads, thereby pro ducing a hollow drum which is substantially water-tight, so as tp hold a volume of water or other li uid. The sheet of metal (1 which serves as t 1e side wall of the drum is preferably imp'erforate, but in any event, is adapted to support the blocks which are I laced in the drum in such manner as to old the blocks in the drum. Bars 0, and b are or wise thedrum for the purpose of strengthening its cylindrical'wall, ,et it is obvious that said parts may be ot erwise strengthened, if necessary. The drumds formed or provided with an opening of suitable dimensions in order that the blocks of wood may be introduced and discharged, and, as herein shown, e re resents the open ing and e the cover there 'or. The opening is herein shown as extended lengthwise the drum and from end to end .thereof, and the cover consists .of a plate having ears 2 ex; tended from it laterally, which are slotted to receive eye-bolts by which it issecured to the drum, although it is obvious that said cover maybe securedto the drum in any other suitable manner.

The drum has arranged, within it a plurality of block-engaging, bark-removing devices, which are herein shown as strips or bars arranged on the inside of its cylindrical wall, beingstationarilysup ported thereon or fixed thereto, as by rivets or bolts. They are preferably made of L-angle iron, one port-ion of which rests on the side Wall and the other portionv of which extends inward at short distance to thereby present ribs which engage the blocks, and the edges of said ribs are constructed and arranged to remove the bark by a rubbing or scraping action.

Each block-engaging, bark-removing de' Vice, as: herein shown, comprises two strips or bars, which extend from the opposite ends of the' drum or thereabi'iuts to the middle, meeting at or about the-middle of the drum, and said strips are arranged diagonally to the axis of the drum, but at an angle to each other; and said strips are curved in the direction of their length in order that'they may conform to the curvature of the cylindrical wall of the drum, and the inner ends thereof are mitered in order that they may abut together. When thus constructed and arranged they present V-shaped engaging ribs, extending fron 1,end to end of the drum, transversely to its direction of rotation, and said" ribs are arranged to point in the direction of rotation of the drum. By arranging these strips orbars' diagonally to the axis of the drum they .perforn'ra shearing action on the blocks. which, when arranged in parallelism with said axis the do not perform. The V-shaped en aging ribs have a tend: ency to move'the blocks, or some of them,; in a direction toward the opposite ends of thedrum and the end walls are, therefore, provided with means for engaging the blocks \w'hich ,-have;,a tendency to move them, or some gof them,inward toward the middle of theirdrum. As a means for accomplishing this.result,,strips or bars f" are arranged radially or otherwise, on the inner faces of the end walls, which, as herein shown are constructed substantially the same as the block-engaging ribs f, so as to operate like said ribs to remove the bark from the blocks while engaging them, et at the same time- ;acting to .move the oose or unrestrained blocks inward toward the middle of the drum- The drum sheet d is madeirn erforate and by means efthe hollow "ourna s a softening agent, in the form of a 'quid, vapor or gas may be introduced at one end of the. drum. and discharged at the opposite end thereof.- I prefer to employ water as the softenin agent, and when such material is employed it fills the lower part of the'drum' and the small pieces of bark float on its surface, and

y supplying water at'oneend of the drum,

the Water, carrying with it the pieces of floatend thereof. My invention is not limited to 'ing bark, will be discharged at the opposite the employment of any particular softening agent for .the purpose of softening the bark and thereby assisting its removal.

In operation, the blocks of Wood are introduced into the drum, partially filling it, and the drum is then revolved and the blocks thereby caused to tumble over each other in the drum, knocking off or scraping off the bark, and as the drum revolves the en agingribs engage the blocks contiguous. tae side wall and end walls, and act to scram oil the bark and also act to move the locks relative to each other, to augment thetumbling action. Thus the bark is removed by the tumbling action and also by the action oft-he engaging-ribs. By the machine herein described, the bark is effectually'removed Without loss of wood and small blocks or sticks of wood or blocks or sticks of wood of small diameter and also irregularly shaped blocks as Well asregulariy shaped blocks may be acted upon.

Referring to Fig. .7 a drum of modified construction is shown. In lieu of an imgerforate drum sheet d a plurality of crossars g are employed, which are attached at their ends to tie leads of the drum, being located a short distance apart and block-engaging ribs g, similar to the ribsf, and having barkremoving edges, are arran ed on the interior of the drum, .being attach bars. The ribs 9 will be diagonally arranged substantially as shown in Fig. 1. With, this form of my invention the drum is especially designed to be partially submerged in a liquid softening agent and to revolve therein, the pieces of bark as they become'detached from the blocks floating on the surface of the softening agents. The engaging-ribs 9 act to scrape off the bark, as in Fig. 1, and the cross-bars serve as supports for said ribs.

Having thus described my invention, what I clainras new and desire to secure by Letters Patent is 2+- ed to said cross- 1. In a bark-removing machine, a revolv ing drum adapted to receive blocks of wood, comprising a cylindrical block-sup porting tached, a plurality of block-engaging ribs having bar -removin edges arranged V- shaped and extended' om ethe middle of the side wall to its opposite endsf d'iagonally' to its axis and pointed in the directionof rotation of the drum, and inwardly-projecting means on the interior of the end'walls of the drum for engaging and moving the blocks in Ward, substantially as described.

2. In a bark-removing machine, a revolving drum adapted to receive blocks of wood, comprising a cylindrical block-supporting side wall and end'walls to which it is attached, a plurality of block engaging ribs having bark-removing edges arranged V- shaped and extending irom the middle of the side wall to its opposite ends, diagonally to its axis and pointed in the direction of rota tion ofthe drum, a plurality of block-engaging ribs having bark-removin ed es, arranged on the interior of the en wal s of the drum which enga e the blocks and move them inward and a so remove the bark therefrom, substantially as described.

3. In a bark-removing machine, a revolving drum adapted to receive blocks of wood, comprising an imperforate cylindrical side wall and end walls to which it is attached, a,

plurality ofblock-engaging ribs having barkremoving edges arranged V-sha ed and extended from the middle of the si e wall to its opp osite ends diagonally to its axis and pointed in the direction of rotation of the drum, substantially as described.

A. In a bark-removing ma'chine a revolving drum adapted to receive blocks of wood,

fcomprisinga cylindrical block-supporting side wall and end walls to which it is attached,a plurality of pairs of longitudinally curved L-an le iron strips attached to the interiorof saic side wall, arran ed V-shaped and extended from theimidd e of the side wall to its opposite ends, in a direction diagonal to its axis and pointed in the direction of rotation of the'drum, the inner ends of the strips of each pair being mitered whereby the may heabutted together, one ortion of eac strip bearin on the side wa and the other portion ro'ecting inwardly to engage the blocks an remove the bark therefrom, substantially as described,

'5. In a bark-removing machine, a revolvside walland end walls to which it is atl the T may be abutted together, one

ing drum adaptedto receive blocks of wood comprising a cylindrical block-supporting side wall and end walls to which it is attached, a plurality of pairs of longitudinallycurved L-angle iron strips attached to the interior of said, side wall, arran ed V-shaped and extended from the midd e of theside wall to its opposite ends, in a direction diagdnal to its axis and pointed in the direction of rotation of the drum, ,the inner ends of the strips of each pair being mitered whereby ortionof eac strip bearing on the side we and the other portion rejecting inwardly to engage the blocks and remove the bark therefr'om, and a plurality of L-angle iron strips atg tached to the interior of the end walls adjai? cent the outer ends of the strips on the side wall, one portion of each strip bearing onthe end wall and the other portion thereof, Ithjecting inwardly to en age the blocks an remove the bark there described. 1

6. In a bark-removing machine, a revolv ing liquid holding drum adapted to receive blocks of wood, comprising a c block-supportin side wall and n walls to which it IS attac 1 ed, said drum aving an in- .let orifice for the admission of li uid and an outlet orifice for the discharge 0 the liquid, the entrance to said outlet orifice being arranged on a level with the surface of the volume of 1i uid which is contained in the drum to rovi e for the escape of pieces of bark which float on said surface, and bark-removing means arran ed on the interior of said drum, substantia 1y as described.

7. In a bark-removing machine, a revolvingdrum adapted to receive blocks of wood, having on its interior block-en removing means, hollow journa s supporting 'it at its opposite ends which opendirectly into the drum and rovide vfor the entrance thereto and the disc ar e therefrom of a softening agent and for t e escape of floating pieces of bark, substantially as described.

In testimony whereof, I have signed my om, substantially as lindric al aging bark- 4 name to this specification, in the presence of two subscribing witnesses. CARL BACHE-WUG.

Witnesses:

B. J. NOYES, H, B. DAVIS.

It is hereby certified that the name of the patentee in Letters Patent No. 889,292,

granted June 2, 1908, for an improvement in Bark-Removing Machines, was

erroneously Written and irinted as Carl Baohe-Wiig, Whereas said name should have been Written and printed as Carl Bache We'vlg; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office. V

Signed and sealed this 3rd day of July, A. D., 1917.

F. W. H. CLAY, Acting Commissioner of Patents.

[SEAL] 

